Primordial non-Gaussianity from the 21 cm power spectrum during the epoch of reionization.

نویسندگان

  • Shahab Joudaki
  • Olivier Doré
  • Luis Ferramacho
  • Manoj Kaplinghat
  • Mario G Santos
چکیده

Primordial non-Gaussianity is a crucial test of inflationary cosmology. We consider the impact of non-Gaussianity on the ionization power spectrum from 21 cm emission at the epoch of reionization. We focus on the power spectrum on large scales at redshifts of 7 to 8 and explore the expected constraint on the local non-Gaussianity parameter f(NL) for current and next-generation 21 cm experiments. We show that experiments such as SKA and MWA could measure f(NL) values of order 10. This can be improved by an order of magnitude with a fast-Fourier transform telescope like Omniscope.

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عنوان ژورنال:
  • Physical review letters

دوره 107 13  شماره 

صفحات  -

تاریخ انتشار 2011